Ruud ANL-AZ 13 SEER Series, Installation Instructions Manual

15

INSTALLATION

Interconnecting Tubing (cont�)

Tubing Installation

Observe the following when installing correctly 

sized type “L” refrigerant tubing between the 

condensing unit and evaporator coil:
•  Check the tables on page 12 for the correct 

suction line size and liquid line size�

•  If a portion of the liquid line passes through a 

very hot area where liquid refrigerant can be 

heated to form vapor, insulating the liquid line is 

required�

•  Use clean, dehydrated, sealed refrigeration-

grade tubing�

•  Always keep tubing sealed until tubing is in place 

and connections are to be made�

•  A high-quality biflow filter drier is included 

with all R-410A heat pump units and must be 

installed in the liquid line upon unit installation�

•  When replacing an R-22 system with an R-410A 

system and the line set is not replaced, use a 

flush kit available through aftermarket stores 

such as Prostock�

•  If tubing has been cut, make sure ends are 

deburred while holding in a position to prevent 

chips from falling into tubing� Burrs such as 

those caused by tubing cutters can affect 

performance dramatically, particularly on small 

liquid line sizes�

•  For best operation, keep tubing run as short as 

possible with a minimum number of elbows or 

bends�

•  Locations where the tubing will be exposed to 

mechanical damage should be avoided� If it is 

necessary to use such locations, the copper 

tubing should be housed to prevent damage�

VAPOR LINE CAPACITY MULTIPLIER (PERFORMANCE PENALTY)

NOTES: 

1� Using suction line larger than shown in chart will result in poor oil return and is not recommended�

2� Do NOT exceed the limits in the liquid and vapor line-sizing charts�

3� Do NOT use 7/8” OD vapor lines in 1-1/2 or 2-ton applications or 1 1/8” OD vapor lines for any applications�

UNIT SIZE

Suction Line

Connection Size

1

1

⁄

2

Ton

2 Ton

2

1

⁄

2

Ton

3 Ton

3

1

⁄

2

Ton

4 Ton

5 Ton

Suction Line

Run - Feet [m]

5/8" [15.9]

3/4" [19]

*

—

Optional

Standard

Optional

Optional

Standard

Optional

Optional

Standard

Optional

Optional

Standard

Optional

25’

[7.6]

50’

[15.24]

100’

[30.5]

150’

[45.7]

5/8" [15.9]

3/4" [19]

*

—

5/8" [15.9]

3/4" [19]*

7/8

—

3/4" [19]*

—

3/4" [19]

7/8" [22.2]*

—

—

7/8" [22.2]*

—

—

7/8" [22.2]*

—

[  ] Designates Metric Conversions

1.00

1.00

1.00

—

1.00

—

—

1.00

1.00

1.00

1.00

1.00

1.00

1.00

—

—

1.00

1.00

—

1.00

1.00

0.98

0.98

0.96

—

0.99

—

—

0.99

0.99

0.98

0.98

0.99

0.99

0.99

—

—

0.99

0.99

—

0.99

0.99

0.95

0.95

0.94

—

0.96

—

—

0.96

0.96

0.96

0.96

0.98

0.96

0.97

—

—

0.97

0.97

—

0.98

0.98

0.92

0.92

0.91

—

0.94

—

—

0.93

0.94

0.93

0.94

0.96

0.95

0.94

—

—

0.95

0.95

—

0.96

0.97

5/8" [15.9] I.D.

5/8"  [15.9] I.D.

3/4" [19] I.D.

3/4" [19] I.D.

7/8" [22.2] I.D.

7/8" [22.2] I.D.

7/8" [22.2] I.D.

Tubing